US Bridges

US 6 (159th St) over I- 94 Bishop Ford

Poor

Cook County, Illinois · 0.7 E Cottage Grove · Structure no. 016038800000000

Built
1947
78 years old, rebuilt 1987
Condition
Poor
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
230 ft
4 main spans
Daily traffic
21,100
2023 count
Owner
State
State Highway Agency

About this bridge

US 6 (159th St) over I- 94 Bishop Ford is a steel continuous stringer/multi-beam or girder carrying US 6 (159th St) over I- 94 Bishop Ford in Cook County, Illinois. It was built in 1947 and reconstructed in 1987, so it is 78 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 2 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: open, would be posted or closed except for temporary shoring.

It carries about 21,100 vehicles a day, roughly 3% of them trucks, projected to reach 25,149 by 2046. The structure is 230 ft (70.2 m) long and 92 ft wide.

CarriesUS 6 (159th St)
CrossesI- 94 Bishop Ford
Location0.7 E Cottage Grove
RouteU.S. Route 6
Coordinates41.60087, -87.58351
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusOpen, would be posted or closed except for temporary shoring
ScourBridge not over waterway
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.5 US tons
Inventory rating19.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length230 ft (70.2 m)
Longest span63 ft (19.2 m)
Deck width92 ft (28 m)
Roadway width78 ft (23.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,100 (2023)
Projected traffic25,149 by 2046
Trucks3%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 6 (159th St) over I- 94 Bishop Ford built?

It was built in 1947, making it 78 years old in 2025. It was reconstructed in 1987.

What condition is US 6 (159th St) over I- 94 Bishop Ford in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.

How much traffic does US 6 (159th St) over I- 94 Bishop Ford carry?

About 21,100 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is US 6 (159th St) over I- 94 Bishop Ford?

The structure is 230 ft (70.2 m) long with a longest span of 63 ft (19.2 m) and a deck 92 ft wide.

Who owns US 6 (159th St) over I- 94 Bishop Ford?

It is owned by the State Highway Agency.